Moving the map and changing the background causes the line you are drawing to disappear

[JamesKingdom]

Here is a video
Not sure what causes it, but I am using CTRL + B to switch backgrounds.
It also happens when going slower, seen here

Using
Google Chrome 58.0.3029.81 (Official Build) (64-bit)
Revision ac0bae59f0aa5b391517e132bf172144b1939333-refs/branch-heads/3029@{#746}
OS Windows
JavaScript V8 5.8.283.32

Thanks

[bhousel]

Looks like this is an issue with the code introduced in a18d690.
The idea is to prevent window.location from changing while the user is drawing something (to avoid the situation where the user accidentally hit the back button and are transported very far away mid drawing)

The problem is that window.location also changes here if the user switches imagery. It fires off a hashchange event - then this code in hash.js checks what changed and if you happened to be moving the map and changing the background at the same time, you are tossed back into browse mode.

[JamesKingdom]

Thank you :) @bhousel